LAS VEGAS, NV - MAY 20: Usher arrives at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images for ABC)

12. Pitbull - Back In Time

(Photo by David Becker/Getty Images)

LAS VEGAS, NV - MARCH 30: Armando 'Pitbull' Perez, winner of the BMI President's Award, performs during the 19th Annual BMI Latin Music Awards at the Encore Las Vegas on March 30, 2012 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)

11. Maroon 5 featuring Wiz Khalifa - Payphone

(Photo by Tasos Katopodis/Getty Images for Caesars Entertainment)

CHICAGO, IL - MARCH 01: Adam Levine and James valentine of Maroon 5 perform at Escape To Total Rewards at Union Station on March 1, 2012 in Chicago, Illinois. (Photo by Tasos Katopodis/Getty Images for Caesars Entertainment)

10. Drake featuring Lil Wayne - The Motto

(Photo by Ronald Martinez/Getty Images)

ORLANDO, FL - FEBRUARY 26: Hip-hop artists Lil' Wayne and Drake (L) sit courtside during the 2012 NBA All-Star Game at the Amway Center on February 26, 2012 in Orlando, Florida. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Ronald Martinez/Getty Images)

NEW YORK, NY - APRIL 23: (L-R) Tom Parker, Siva Kaneswaran,Jay McGuiness , Max George and Nathan Sykes of the band The Wanted shop at Tommy Hilfiger Fifth Avenue on April 23, 2012 in New York City. (Photo by Jamie McCarthy/Getty Images for Tommy Hilfiger)

LONDON, ENGLAND - APRIL 19: Nicki Minaj signs copies of her number one album 'Pink Friday: Roman Reloaded' at HMV Whiteleys on April 19, 2012 in London, England. (Photo by Danny Martindale/Getty Images)

2. Fun. - We Are Young

(Photo by Charles Eshelman/Getty Images for Spotify)

NEW YORK, NY - NOVEMBER 30: (L-R) Andrew Dost, Nate Ruess and Jack Antonoff of the band Fun attend Spotify knocks it out of the park at Stephen Weiss Studio on November 30, 2011 in New York City. (Photo by Charles Eshelman/Getty Images for Spotify)

1. Gotye - Somebody That I Used To Know

(Photo by Michael Buckner/Getty Images for Coachella)

INDIO, CA - APRIL 15: Musician Wouter "Wally" De Backer aka Gotye performs during Day 3 of the 2012 Coachella Valley Music & Arts Festival held at the Empire Polo Club on April 15, 2012 in Indio, California. (Photo by Michael Buckner/Getty Images for Coachella)